Is Sugar keto?
Not keto-friendly 12.5 g net carbs per one tablespoon (12.5 g) — 63% of a 20 g keto day.
Short answer: Not in normal portions. One tablespoon (12.5 g) of sugar: 12.5 g net carbs — 63% of a strict 20 g keto day — with 0 g fat and 0 g protein.
Table sugar is pure carbohydrate: one teaspoon is 4 g of net carbs, and one can of regular soda holds about 35 g, nearly two strict keto days. Brown sugar, coconut sugar and honey are no better.
How sugar fits a keto carb budget
On a 20 g day, one serving uses 63% of your budget, leaving 7.5 g for everything else. Measure portions rather than eyeballing them.
Worked example. 12.5 g of sugar = 12.5 g total carbs − 0 g fibre = 12.5 g net carbs, 0 g fat, 0 g protein and 48 kcal.
If you still want some, plan it: a strict day is 20 g, and how net carbs are counted explains why the fibre here does not rescue it.
Nutrition facts
| Nutrient | Per 100 g | Per one tablespoon (12.5 g) |
|---|---|---|
| Calories | 387 kcal | 48 kcal |
| Fat | 0 g | 0 g |
| Protein | 0 g | 0 g |
| Total carbohydrate | 100 g | 12.5 g |
| Fibre | 0 g | 0 g |
| Net carbs | 100 g | 12.5 g |
Where the energy comes from:
How to eat sugar on keto
- Erythritol, allulose, stevia and monk fruit sweeten without counting as net carbs.
- Watch for hidden sugar in sauces, dressings, cured meats and "low-fat" products.
Compared with other extras
Sugar ranks #9 of 9 extras in our database by net carbs per 100 g (lowest first). The in-between foods people ask about most.
| Food | Net carbs / 100 g | Per serving |
|---|---|---|
| Pork rinds | 0 g | 0 g |
| Coffee (black) | 0 g | 0 g |
| Almond milk (unsweetened) | 0.3 g | 0.7 g |
| Mayonnaise | 0.6 g | 0.1 g |
| Hummus | 8.3 g | 2.5 g |
| Dark chocolate (70–85%) | 35 g | 7 g |
See all extras ranked by net carbs →
Frequently asked questions
How many net carbs are in sugar?
Sugar has about 100 g of net carbs per 100 g (100 g total carbohydrate minus 0 g fibre), and about 12.5 g per one tablespoon (12.5 g).
Can you eat sugar on keto?
Not in normal portions. One one tablespoon contains 12.5 g net carbs, 63% of a strict daily limit.
Values are per 100 g of the raw or stated food, rounded, from USDA FoodData Central. Brands and varieties differ — check the label for packaged products.